Promtail regex example I tried all combinations, but I am not able to see the labels in Grafana. But I have to admit that my current For example, perhaps you want to use a regex to extract your log lines into searchable fields, or add a new label to your logs, or drop log lines that you don't need. I want to send only the ERROR log. Printing Promtail Config At Runtime. Attached are the sample log lines and confing info from Promtail. Below is the snippet of my Promtail configuration: match: # LogQL stream selector and line filter expressions. Log Lines Example: [Test Message 1. yaml config server: http_listen_port: 9080 grpc_listen_port: 0 pos Saved searches Use saved searches to filter your results more quickly Use filter expressions (|= "text", |~ "regex", ) and brute force those logs. cri. All I want to do is drop log lines that originated from Uptimerobot software we use to determine if our userAgent: userAgent - drop: source: "userAgent" regex: ". yaml --stdin --dry-run I can easily define this regex for instance: &?([^=]+)=([^&]+) but cannot be applied in regex pipeline since it works only with named groups. /promtail-linux-amd64 -config. Is there a way to to that? (I know from loki doc that we should avoid having too much possibility for a static label. Hello Community, I have a legacy system which generates enormous amounts of logs. The regex stage is a parsing stage that parses a log line using a regular expression. [source: <string>] # Label values on metrics are dynamic The positions file helps Promtail continue reading from where it left off in the case of the Promtail instance restarting. Description; Usage; Reference; Changelog; Limitations; Development; Module Release; Description. The positions file helps Promtail continue reading from where it left off in the case of the Promtail instance restarting. 13 and will be removed in 0. Path: # RE2 regular expression, if matched will start a new multiline block. Here is an example of creating a label out of every field You signed in with another tab or window. Add a comment | 0 . In a typical setup, we would deploy one promtail agent per host. Grafana Loki. yaml), and mounts the same logs volume as Nginx. Here are two examples: Tailer - A reader that reads log lines as they are appended, for example, agents like Promtail. Here is the query I use in Loki + referer field to look only the domian request. ① The format key will likely be a format string for Go’s time. template. grpc_listen_port: 0. I try many configurantions, but don't parse the timestamp or other labels. ; regex: Extract data using a regular expression. I try to use Pattern and Regular expression But don’t know how to handle multi-line parsing. e you cannot use the value of other labels. Configuration File Reference To specify which configuration file to load, pass the --config. This series of examples will illustrate basic use cases and concepts for labeling in Loki. go, then parses each log line to extract more labels and filter with Unlike most stages, the cri stage provides no configuration options and only supports the specific CRI log format. geoip_autonomous_system_number: 396982; geoip_autonomous_system_organization: GOOGLE-CLOUD-PLATFORM; For more information and real life example, see Protect PII skip: do not change the timestamp and keep the time when the log entry has been scraped by Promtail; Examples. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Promtail example extracting data from json log Raw. Then use the labels stage to set the value of the initial label to the name of the named capture group from the Labels from Logs. I want to display some of this data in my Grafana dashboard and for that I am using Promtail to read logs from the file, pre-process it and send it to Loki. 2k 3 3 gold badges 47 47 I have logs with all kind of different codes (there could be more codes added in the future). parse_from: body: The field from which the value will be parsed. Grafana/loki may be holding onto previous data which could be why varlogs appeared as a job name there, since it's not defined in your Promtail config. I've been struggling to get a regex string working. I was following the documentation. url: Q: Under what scenario should I use regex in the promtail pipeline if the pattern parser does the same but better, just missing the conceptual part (s)? Promtail is installed as a service on the application servers. " networks: Connects the service to the "blog Unsupported characters in the label should be converted to an underscore. running is Kubernetes. How do I use promtail or LogQL to retrieve the information I want, such as Time, Query_time, User@Host, and sql information. Maybe a specific 'source' must be set for regex but nothing found in the documentation. The geoip stage performs a lookup on the ip and populates the following labels:. Take note of any errors that might appear on your screen. (ZeroWidthSpace is at the beginning of Hi! I’m trying to use Pipelines to define a timestamp from logs that are presented in a . API. Unlike most stages, the docker stage provides no configuration options and only supports the specific Docker log format. This Grafana Loki tutorial walks through the installation, setup and use of the log processing tool. This endpoint returns 200 when Promtail is up and running, and there’s at least one working target regex_parser: A unique identifier for the operator. regex, promtail, timestamp. Unlike traditional logging solutions, Loki is optimized for a “cost 另一件值得指出的事情是，UNIQUE-ID将是一个VIN ID (车辆识别号码)。 我希望创建的组是：ip request endpoint status。但是，由于endpoint1中的所有endpoint1以及endpoint1和endpoint3中的unique_values，所以使用完整的端点路径会在loki中造成太多的流，并基本上杀死它。. Like in the example above, the __syslog_message_hostname field from the journal was transformed into a label called host through relabel_configs. Promtail configuration. You can do dry run as below to verify the promtail config is parsing the labels & timestamp properly. I am trying to label all logs that come out of a folder with the name of the folder. I have a probleam to parse a json log with promtail, please, can somebody help me please. The template stage is a transform stage that lets use manipulate the values in the extracted map using Go’s template syntax. You switched accounts on another tab or window. [separator: <string> | default = ";"] # RE2 regular expression. cat /sample. Plea Hello! I am trying to parse some log data created by a command line tool for debugging purposes. Parse or a format string for strptime, this still needs to be decided, but the idea would be to specify a format string used to extract the timestamp data, for the regex parser there would also need to be a expr key used to extract the timestamp. go" | logfmt | duration > 10s and throughput_mb < 500 which will filter out log that contains the word metrics. file flag at the command line. logs: positions_directory: C:\\ProgramData\\grafana-agent\\log-positions configs: - This should be possible with the pipeline stages in promtail. For example, if you wanted to I expect, that if the key RequestPath contains any guid, it will be transformed in to xxxx Example data: Input: /here/2479a99a-ad75-4475-bb36-63d02eabd608 Expected: /here/xxxx I get this instead: In my own words: the regex can the The 'eventlogmessage' Promtail pipeline stage. I am currently trying to set up log monitoring for a docker swarm cluster using promtail, loki and grafana. log is processed and you get ** in grabbers from it. It is usually deployed to every machine that has applications needed to be monitored. See the instructions here. Loki is configured to collect and store log data, while Promtail is set to scrape PostgreSQL logs and send them Promtail, just like Prometheus, is a log collector for Loki that sends the log labels to Grafana Loki for indexing. However, Loki will perform some deduplication at query time for logs that have the exact same nanosecond timestamp, labels, and log contents. Show hidden characters version: " 3. See Relabeling for more information. 1] [ 32] [Second Message 1. You signed out in another tab or window. We will look at the differences between using Dockerfiles and Helm charts for deploying Promtail and the recommended approach for configuring pipeline stages. Before sending the log files it processes and labels the log lines. I will discuss these points more later in the post. Not covered: Deployment of the Promtail container. In this configuration, we pass logging: "promtail" as a label to the Nginx container. Having said that I found it easier to break the message down into three separate regular expression patterns and then combine This Grafana Loki tutorial walks through the installation, setup and use of the log processing tool. It’s difficult to do this from the text files and sometimes openhab stops being happy due to platform issues (low on RAM). Products. Deploy and configure Grafana's Promtail on a node. The log structure is a JSON string without any nesting. Hi Folks, I am trying to use loki and not able to properly configure promtail to parse JSON logs. filename: /tmp/positions. the query language used with Loki. GitHub Gist: instantly share code, notes, and snippets. 14. This stage looks for a time field in the extracted map and reads its value in RFC3339Nano form (e. I browsed a lot of examples on line, and none of them seem to work when I include it in my Promtail YAML file. The named capture groups will be extracted as fields in the parsed body. Promtail example extracting data from json log. {app="nginx-ingress-microk8s-cont Hi @emilechaiban. Promtail can be configured to print log stream entries instead of sending them to Loki. My solution is somewhat working, except that it does not handle multiline messages which are split by hitting max_lines. Log Rotator - A process that rotates the log file either based on time (for example, scheduled every day) or size (for example, a log file reached its maximum size). The template stage is primarily useful for manipulating Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Tinkering with Loki, Promtail, Grafana, Prometheus, Nginx and Dnsmasq - dnsmasq. 1. And while you may think that you need to deploy updates to your Promtail configuration in order to test them, you can actually test these locally first with a few simple steps! Describe the bug Given a nginx log with date & time with missing timezone information. Loki labels demo. selector: <string> # Names the pipeline. You can also filter metrics by their labels using regex. enableTracing: bool: false: The config to enable tracing: config. filename should be used as source to Configure Promtail. There are a few testers out there, but none of them seems to understand my statement. That means the actual payload (log line) pushed to my qryn But the regex is always not working. . Basically I want the logs to be labeled with the name of the * value. The Promtail configuration you get from the Helm chart is already configured to get all the logs from your Kubernetes cluster and append labels on it as Prometheus does for metrics. If undefined, default name "promtail_custom_" will be prefixed. The docs have some examples regex | Grafana Loki documentation The second issue you might have is your timestamp doesn’t have time zone info in it, you should explicitly set the time zone in the timestamp stage to make sure you are parsing the timestamp with the correct time zone. It is also painful to test regex by continuously stopping and restarting the Promtail daemon (I am not a regex pro in all the flavors of regex that are used today, Loki and Promtail understand Go RE2 regex strings). Is there any other way to dynamically achieve this? In fact Promtail is quite short on dynamic label/fields handling, the only feature we are using related to this is the labelmap relabel config. metrics. output: Next in pipeline: The connected operator(s) that will receive all outbound entries. This section is a collection of all stages Promtail supports in a Pipeline. Schema Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. My objective is to transform the free-form ones to the same logfmt as the others, independent of any other labeling. Once Promtail has a set of targets (i. yaml. ; logfmt: Extract data by The 'pack' Promtail pipeline stage. ; json: Extract data by parsing the log line as JSON. Everything is on a k8s cluster. Each combination of labels will create a new log stream and this will fragment the data store. New Cisco I have a promtail and docker compose config and setup that works fine but when i try to follow same for docker swarm cluster, logs are not showing up for some reason I have searched online for a doc Promtail appears to be using only the parameters for the last static_config with the job_name "system". In the following example, only the first log line can be properly formatted using the cri stage: Copy "2019-01 When Promtail receives syslog messages, it brings in all header fields, parsed from the received message, prefixed with __syslog_ as internal labels. enabled: bool: true: Enable Promtail config from Helm chart Set You just need to specify how the stacktrace's firstline begins, for example: scrape_configs: - job_name: file pipeline_stages: - multiline: firstline: '^\d{4}-\d{2}-\d{2}' maw_wait_time: 1s static_configs: With that, only lines starting with a date like "2020-08-21" will be consider as starting lines. Here fd defines a file descriptor. Implementing Regex in Prometheus Metric Queries Regex can be a powerful tool in Prometheus queries, especially when you want to filter metrics based on their names or labels. I configured my helm chart to the latest Promtail version (v2. Schema. yml This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. Whatever the order between regex and multiline, i never succeed to extract the subject or at least to send it to loki from promtail I checked regex on regexp101 with go regexp and it’s working fine. The regex stage can operate on incoming labels by putting the label key in the source field. How much of the example you have shown is constant, and how much is variable from one ocurrence to the next? For example, does every instance start with “sgrvrthf”? The promtail agent is responsible for collecting log messages and passing them to a Loki agent. Conclusion. The file is written in YAML format, defined by the schema Hello all, This small tutorial explains some of the basics of setting up a log and system monitoring environment. yaml Copy. user3045272 user3045272. Promtail has access to the log folder of the host machine. This works fine however I'm not interested in the filename label that is being generated from __path__. image 798×304 11. The 'drop' Promtail pipeline stage. I don't think the regex is expecially complex I'm trying to sort through amazon ALB logs that contain this line: *https://agent\. If you often parse a label from a log line at query time, the label has a high cardinality, and extracting that label is expensive in terms of performance; consider extracting the label on the client side attaching it as structured metadata to log lines . Query examples. count. Expected behavior I'd expect the regex pipeline stage to see the (same) log line whether it comes from a file or syslog. Promtail, Grafana, Loki version is 2. eventlogmessage: # Name from extracted data to parse, defaulting to the name # used by the windows_events scraper [source: <string> | default = message] # If previously extracted data exists for a key that occurs # in the Message, when true, the previous value will be # overwriten by the value in the Message. Any line that does not match the expression is considered to be part of the block of # This is useful if the observed application dies with, for example, an exception. # No new logs will arrive and the Using regular expressions in Prometheus relabel_configs source_labels. 61 Recent content in Promtail pipeline stages on Grafana Labs. Install Promtail Binary and Start as a Service LogQL Install a Second Promtail Service A Dashboard Variables Example Repeating Timeseries using Dashboard Variables MikroTik 260GS SNMP Dashboard Alerting Rule for High CPU Alerting Rules for Node Exporter and Prometheus Down It is similar to using a regex pattern to extra portions of a string, but faster. The cri stage is a parsing stage that reads the log line using the standard CRI logging format. The 'multiline' Promtail pipeline stage. If everything went well, you can just kill Promtail with CTRL+C. parse_to: attributes I am using a pattern to add tags to different log fields of my nginx ingress. I'm having some challenges with coercing my log lines in a certain format. Loki uses Promtail to aggregate logs. 8443515; extra: {"user": "marco"}; The second stage will parse the value of extra from the extracted data as JSON and append the following key-value pairs to the set of extracted data:. # Determines how to parse the time string. Each log line from Docker is written as JSON with the following keys: log: The content of log line; stream: Either stdout or stderr; time: The timestamp string of the log line; Examples. CRI specifies log lines as space-delimited values with the following components: time: The timestamp string of the log; I have a some of docker containers with names: project1-api project1-crons project2-api project2-crons etc And I need to have a label like “project1”, “project2” to filter in in Grafana Loki So I think to parse log in promtail with some regexp to add label “project1”, “project2” etc, but cann’t to have a correct config of Promtail Maybe there are other way to solve my From that, i would like to create labels for method, URL, host i have tried the JSON expression like below in promtail. Path: Copied! Products Open Source Solutions Learn Docs Company; Downloads Contact us Sign in; Create free account Contact us. Share. I can view the logs in Loki. You can use the following functions to perform regular expressions in a template expression. ; cri: Extract data by parsing the log line using the standard CRI format. Is there a way to grab the log message in promtail so that I could apply the regex promtail: Defines the Promtail service, pulls the latest Promtail image, mounts a configuration file (promtail-config. Follow edited Jun 24, 2021 at 13:06. csv file. Promtail pipeline stages. Before you start you’ll need: An AWS account (with the AWS_ACCESS_KEY and AWS_SECRET_KEY); A VPC that is routable from the internet. What happened? I am using pipeline stages Hi there, I’m using promtail 2. Jiggy Jiggy. However, with my current promtail configuration all container logs get send unagregated to loki. Only the static labels are available. Use a new named capture group in your regex for just the part you want to keep. This endpoint returns 200 when Promtail is up and running, and there’s at least one working target Hello , I am writing Promtail syslog receiver of (Pfsense)Openvpn logs and normalize them into lables the log line example as follows below including my Promtail config, i managed to get most of my desired data into labels, but i would like to set label as vpn_auth_status , if its equal to as follows vpn_auth_status = could not authenticate. You now have Loki and Promtail set up to monitor your PostgreSQL logs. It is built specifically for Loki — an instance of Promtail will run on each Kubernetes node. Make sure you are in same dir as promtail-linux-amd64 when running that, and promtail is set to scrape /sample. example logs are: 09:59:26 Project configuration field `modules` is deprecated in 0. My problem: I don't see any labels in my log entries. 5: 107: August 21, HI all, I have logs aggregated at /applogs/hostname/app. yaml) which contains information on the Promtail server, where positions are stored, and how to scrape logs from files. Promtail is the metadata appender and log sending agent. Objective/Intro I’m trying to achieve multiline logging on a container (docker) based installation (kubernetes cluster) using loki and promtail through helm charts. Modified 2 years, 2 months ago. e. Must be Gauge. Marcelo Ávila de Oliveira. However, you can tune the configuration for your needs. [description: <string>] # Defines custom prefix name for the metric. cri: # Max buffer size to hold partial lines. The Promtail configuration you get from the Helm chart is already configured to get all the logs from your Kubernetes cluster and append labels promtail-linux-amd64 -dry-run -config. file=promtail-local-config. *) to catch everything from the source label, The 'logfmt' Promtail pipeline stage. g. Install using APT or RPM package manager. I personally find this easier than using regex. Furthermore, every attempt has finished with my Promtail docker failing to start up :o(The following is the contents of my YAML file. ]+) pretending to be amateur usually under disguise. config. Related topics The Result: When we want to relabel one of the source the prometheus internal labels, __address__ which will be the given target including the port, then we apply regex: (. Its configured to read the logs from different directories and push it to Loki. The problem I'm having is it's not working with positive lookahead This example of config promtail based on original docker config and show how work with 2 and more sources: Filename for example: my-docker-config. type: Gauge # Describes the metric. Then the extracted ip value is given as source to geoip stage. Return all log lines for the job varlog {job="varlogs"} Return all log lines for the filename /var/log/syslog Google Regular Expression (RE2) Syntax. The forwarding of the logs from promtail to loki and the visualisation in graphana is all working fine. 我的解决方案regex如下所示： we recently decided to install loki and promtail via the loki-stack helm chart. It may also be common to see the use of match at static_labels only allows adding a static label to the label set, i. shiv Hello, i would like to know how to configure multiline configs via helm or just promtail. To Reproduce create ~/promtail. If no source is provided, then the regex attempts # to match the log line. ; a log pipeline |= "metrics. This can be used in combination with piping data to debug or troubleshoot Promtail log parsing. Every Grafana Loki release includes binaries for Promtail which can be found on the Releases page as part of the release assets. Since I may have 10 to 20 hostnames and a dozen of apps, I set _ _ path _ _ to /applogs/**/*. *uptimerobot. This #The metric type. Path: The replace stage is a parsing stage that parses a log line using a regular expression and replaces the log line. No much Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company In the meantime, I have setup another Promtail instance on my other server, which is running nginx reverse proxy and jellyfin media player. I am unable to do LogQL queries based on hostname or any type of query based on facility. Prometheus should be configured to scrape Promtail to be able to retrieve the metrics configured by this The first stage would create the following key-value pairs in the set of extracted data: output: log message\n; stream: stderr; timestamp: 2019-04-30T02:12:41. My English is not good, this is translated by translation software, please forgive me. If `source` is provided and it's a list, the regex will attempt to match # the concatenated sources. Rather, it is using the timestamp where Promtail pushed said log to Loki. Read the details here. Signature: regexReplaceAll(regex string, src string, replacement string) (source) Example: template Copy This webinar focuses on Grafana Loki configuration including Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Promtail is distributed as a binary, in a Docker container, or there is a Helm chart to install it in a Kubernetes cluster. regex The regex stage is a parsing stage that parses a log line using a regular expression. user3045272. 7 KB. Grafana Labs Community Forums Continuing to look into this on my end. I'm trying to save the meta labels retrieved from EC2 Service Discovery as target labels. I tried the following promtail config, label names are slightly different but with this config the loki data source does not generate the label from regex. 22. The 'replace' Promtail pipeline stage. I want to filter log lines with labeling using regex. yml Some examples please. The metrics stage is an action stage that allows for defining and updating metrics based on data from the extracted map. The 'labels' Promtail pipeline stage. The exception in the log matches the regular expression. Return log lines that are not within a range of IPv4 addresses: Promtail. Promtail is an agent which ships the contents of local logs to a private Loki instance or Grafana Cloud. Hi, Did you check the official example : Grafana Labs regex. A new block is identified by the firstline regular expression. 4. These are my log lines: [DEBUG]: Starting the application [PROCESS]: Trying a division [WARNING]: dividing by zero(0) might You are using __path__ as source, so /var/logs/scrapyd/logs/grabbers/**/*. Promtail. Modified date: July 9, 2024. 125 1 1 silver You signed in with another tab or window. It extracts all log data and forwards the content to Loki. In order to get this system attached to Loki my idea is to have a configuration that drops anything per default except lines that match a Regex ruleset. These LogQL query examples have explanations of what the queries accomplish. This is the relevant portion of my promtail conf: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The 'labeldrop' Promtail pipeline stage. Master R in 2024: Top Books for All Levels. I'm mostly concerned about the tags - every instance contains a lot of them and I Im trying to extract subject as label from mailbox file. 1. 7 and I have a specific use case with promtail. According to RFC 5424, the Syslog message should be in the following format: HEADER SP STRUCTURED-DATA [SP MSG], where SP is a space character and the brackets represent the data is optional. If you pass Promtail the flag -print-config-stderr or -log-config-reverse-order, (or -print-config-stderr=true) Promtail will dump the entire config In this article, we explore the use of Kubernetes SD Configs in the context of Promtail pipeline stages. This document describes known failure modes of Promtail on edge cases and the adopted trade-offs. ② One of the json elements was “stream” so we extract that as I'm looking for a regular expression tester for Google Big Data (RE2) reg expressions. Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. Follow answered Feb 23, 2022 at 13:11. wlargou January 26, 2021, 1:13pm 2. See the golang Regexp. Install Promtail Binary and Start as a Service LogQL LogQL Table of contents Video Lecture Description Log Stream Selectors Operators regex does not match; Examples. ([^. >> I want promtail to parse them and send them to a Loki instance. The promtail agent uses a YAML configuration to define how For example, a PfSense log, I want to see the full message and then be able to break it down by the various fields <Pass/Block>, etc, and of course be able to Documentation Ask Grot AI Plugins Get Grafana. conf I want Promtail to discard logs that contain the word "connection". This is my current config. Reload to refresh your session. The 'logfmt' Promtail pipeline stage. Since you already have a relabel_configs section maybe you can generate the OriginId directly from the relabeling step? Something like: - source_labels: ['__journal__machine_id', '__journal__hostname', '__journal_syslog_identifier'] separator: '_' Describe the bug Promtail 2. Logs. You signed in with another tab or window. To review, open the file in an editor that reveals hidden Unicode characters. kubernetes. Promtail pipeline stages on Grafana Labs. , things to read from, like files) and all labels are set The query is composed of: a log stream selector {container="query-frontend",namespace="loki-dev"} which targets the query-frontend container in the loki-dev namespace. I am here] The 'replace' Promtail pipeline stage. Viewed 6k times Part of AWS Collective 4 . Can use # pre-defined formats by name: [ANSIC UnixDate RubyDate RFC822 # RFC822Z RFC850 RFC1123 RFC1123Z RFC3339 RFC3339Nano Unix # UnixMs UnixUs UnixNs]. Improve this answer. labeldrop regex: filename logging; label; promtail; Share. user: marco; Using a JMESPath Literal Hello 👋 Thanks for any help and feedback in advance 🙂 . We tried with the following promtail config file: > pipeline_stages: > - match: > selector: '{job="test1"}' > stages: > - regex: > expression: 'some regular expression' > - timestamp: > source: timestamp > format: "2022-01-01 00:03:06. We get some logs from Promtail and we can visualize them in grafana but our development namespace is nowhere to be found in loki. Once a file is open for read or write, The Operating System returns a unique file Troubleshooting Promtail. However, when parsing it through Promtail, it appears to be parsed but not being used as the displayed timestamp. The config of clients of the Promtail server Must be reference in config. What’s the best way to handle path with wildcards? scrape_configs: - The regex stage parses the log line and ip is extracted. I want a pie chart that shows the percentage of the number of times each code appears in the logs. log. relabel_configs allows for fine-grained control of what to ingest, what to drop, and the final metadata to attach to the log line. Loki and promtail kind of work. When defined, creates an additional label in # the pipeline_duration_seconds histogram, where the value is # concatenated with job_name using an underscore. Hello , I am writing Promtail syslog receiver of (Pfsense)Openvpn logs and normalize them into lables the log line example as follows below including my Promtail config, i managed to get most of my desired data into labels, but i would like to set label as vpn_auth_status , if its equal to as follows The 'template' Promtail pipeline stage. so I came up with this pattern to match the other log and regex. *" Share. Path: Copied! The default separator is a semicolon. LGTM+ Stack. Promtail borrows the same service discovery mechanism from Prometheus. Ask Question Asked 4 years, 9 months ago. I have tried to parse the JSON i was able to extract the req but i don't know how to parse the nested one in promtail I am new to Promtail. file ~/etc/promtail. regex: required: A Go regular expression. file to configure clients: config. Screenshots, Promtail config, or terminal output The 'metrics' Promtail pipeline stage. Jellyfin's server Promtail setup looks like following: I have a promtail and docker compose config and setup that works fine but when i try to follow same for docker swarm cluster, logs are not showing up for some reason I have searched online for a doc Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company We need to be able to only process the logs that matches regular expressions and the remaining logs should be dropped. Examples. 3] - [Hi Everyone. The video has to be an activity that the person is known for. It's being used for Promtail to parse labels from my logs. For example, the label app. ) logging; grafana; grafana-loki; Share. havequick havequick. because, when I tried to use an alternative pattern like [^[^E]*([E][^R]|[^E])*$], it worked. 2: 4071: February 17, 2023 Loki only displays the first line of multi-line logs, cutting off the remaining lines. All. promtail is configured using a scrape_configs stanza. It works – and it’s fast. In Loki, I want to filter the data based on the parsed values. : readline_rate: 100: The rate limit Run the Promtail client on AWS EC2. promtail. Follow edited Sep 21, 2023 at 14:33. I'm running one promtail instance on several log files, of which some are logfmt and others are free-form. io/name should be written as app_kubernetes_io_name. For the given pipeline: What is Loki? Loki is a log aggregation system developed by Grafana Labs, designed specifically for storing and querying logs. i test it to match the DEBUG log level only [^[^D]*([D][^E]|[^D])*$] and the dashboard really shows DEBUG only while there are many INFO logs too. In this post, we shall cover the following: Installation of Grafana; How to install Loki; Master Regular Expressions By Reading the following books. The logfmt parsing stage reads logfmt log lines and extracts the data into labels. The timestamp format you are using in your config looks bit weird, From the docs it should be one of the following. Modified date: April 12, 2024. These are the ones I've tried and they've worked for simple expressions but not with mine: I just came across this problem recently. Learn how Loki works through the use of regular expressions and limited resource consumption. Deduplication is not done. Previous Install Promtail Binary and Configuring Promtail Promtail is configured in a YAML file (usually referred to as config. If you pass Promtail the flag -print-config-stderr or -log-config-reverse-order, (or -print-config-stderr=true) Promtail will dump the entire config Configure Promtail. , 2006-01-02T15:04:05. Promtail features an embedded web server exposing a web console at / and the following API endpoints: GET /ready. The first stage would append the value of thekubernetes_pod_name label into the beginning of the log line. asked Sep 21, 2023 at 14:15. Follow Regex, Grafana Loki, Param Default Description; readline_rate_enabled: true: When true, enforces rate limiting. Note. I’ve tried different regex methods i’ve found but anything I try keeps Grafana Agent service from starting. 9. ; cri: Extract data by parsing the log line Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company When using Promtail for log scraping, is there a way to configure two labels with the same value based on a single regular expression? So given something like this: - match: selector: ' I have read the docs for promtail and doing pipelines and I cannot make heads nor tails of it. Always-on Hello! I am trying to parse some log data created by a command line tool for debugging purposes. in double-quoted strings, note that all backslashes in a regex expression Does this happen because promtail can’t understand the regex pattern? I think this was right. : readline_rate_drop: true: When true, exceeding the rate limit causes Promtail to discard log lines, rather than sending them to Loki. 999999999-07:00). Then any combination of other stages follow to use the data in the extracted map. For example, a professional tennis player pretending to be an amateur tennis player or a The 'labels' Promtail pipeline stage. The resulting time value will be used as the timestamp Scraping configs ⚑. Dry running. Here is an example of my logs: I am mounting this NFS volume on my promtail nodes, and using static_config to scrape the file. I use this in case of issues with my openhab setup, to analyse what went wrong, when to find a solution. It uses the exact same service discovery as Prometheus and support similar methods for labeling, transforming, and filtering logs before their ingestion to Loki. When Promtail receives syslog messages, it brings in all header fields, parsed from the received message, prefixed with __syslog_ as internal labels. NET, Rust. I’d like to have logs labelled with hostname and app. Promtail is a logs collector agent that collects, (re)labels and ships logs to Loki. The pack stage is a transform stage which lets you embed extracted values and labels into the log line by packing the log line and labels inside a JSON object. log | . 555" > Is it possile to parse first part of the log as json, and for stack-trace make new label ("stackTrace" for example) and put there all the lines after first part? Unfortunately, logs can contain a different number of fields in json format, and therefore it is unlikely to parse them using regex. Basic Regex Query for Log Filtering. 2] [Third Message 1. Log query examples Examples that filter on IP address. docker-compose. Regex match a line. 6 " services: Describe the bug I'm using Loki with Promtail and wanted to add pipeline_stages to redact some sensitive information (PII logs). powered by Grafana Loki. In this tutorial we’re going to setup Promtail on an AWS EC2 instance and configure it to sends all its logs to a Grafana Loki instance. Path: Copied! for example: Two scrape configs read from the same file; Duplicate log lines in a file are sent through a pipeline. Is my use case feasible with Promtail? If not, which log help with regex and pipeline stages promtail . log entry: {timestamp=2019-10- Note: For log filtering, you need to configure Loki and Promtail. Typical pipelines will start with a regex or json stage to extract data from the log line. My block is the following : - job_name: crontab pipeline_stages: - regex: expression: "^Subject: Help Using Promtail template to change regex detection group to required value . This label is used to instruct Promtail to scrape and collect the logs specifically from containers labeled with logging: "promtail", as we have configured Promtail to pull logs from containers with this label. Named capture groups in the regex support adding data into the extracted map. Follow answered Jun 9, 2023 at 14:31. Improve this question. Comments. yaml Copy - timestamp: source: time format: RFC3339Nano. The labeldrop stage would drop the label from being sent to Loki, and it would now be part of Any Stage is capable of modifying the labels, extracted data, time, and/or entry, though generally a Stage should only modify one of those things to reduce complexity. I've tried many things, including relabel, but it doesnt work, promtail just sent it empty to loki. Loki's design builds on its . http_listen_port: 9080. For the given pipeline: yaml Copy - json: expressions: stream: stream - labels: I have managed to convert the given timestamp into a RFC3339 format. log I have relabel setup as below, I get “**” as label hostname and “*” as label logname. Learn more about bidirectional Unicode characters. It's not a good idea to convert something like response_time to a label due to the great increase in cardinality. When false, exceeding the rate limit causes Promtail to temporarily hold off on sending the log lines and retry later. I tried timestamp stage with location field but it looks like that this field does nothing. 0), and set the configuration to have these I had acheived this using grok patterns in logstash, but i’ve no idea how this can be done with promtail or loki. Requirements. So that’s why I integrated I am using log4js to log data to a file in my app. The only thing I found is the drop Stage but this is the opposite I want. replaceAll documentation for more examples. I have some log examples as shown: event,1107,0deba616-9f81-488f-81c1-af4a01040347,,,,,83cd55a9-95bf-4eb5-a221-af4900c Labels are used to index logs in Loki. yml Regular expression functions. Promtail has been configured to use basic auth and extract Docker log files. [prefix: <string>] # Key from the extracted data map to use for the metric, # defaulting to the metric's name if not present. Promtail is configured in a YAML file (usually referred to as config. Let’s take an example Promtail/Alloy config file: How to use Promtail pipelines to transform single log lines, labels, and timestamps. On the test server, I have set tenant_id before installing and connecting Promtail from the second server, and even stopped that instance alltogether. Parsing stages: docker: Extract data by parsing the log line using the standard Docker format. Note that created metrics are not pushed to Loki and are instead exposed via Promtail’s /metrics endpoint. 1 ignores/doesn't parse a custom format value in the timestamp stage. pack. Install the binary. Saved searches Use saved searches to filter your results more quickly Promtail configuration. # This is useful if the observed application Promtail pipeline stages. I would like to interpret the time as local timezone. Environment: latest grafana/promtail:latest docker container. oifxhs dyiigsu fzwoq pnxt jrxq njuvhfu blqtettv wckaeoj gswsxgw puxxj